Arithmetic and control unit



FIG. 1 is a perspective view of a first embodiment of an arithmetic and control unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and

FIG. 6 is a top plan view thereof.

FIG. 7 is a perspective view of a second embodiment of an arithmetic and control unit showing my new design;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a right side elevational view thereof; and

FIG. 12 is a top plan view thereof.

FIG. 13 is a perspective view of a third embodiment of an arithmetic and control unit showing my new design;

FIG. 14 is a front elevational view thereof;

FIG. 15 is a rear elevational view thereof;

FIG. 16 is a left side elevational view thereof;

FIG. 17 is a right side elevational view thereof; and,

FIG. 18 is a top plan view thereof.

The portions indicated in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an arithmetic and control unit, as shown and described. 